Autism Bill

I am amazed at the response I am getting from the Minister—I am sure everybody is. She has been talking since half-past 11; her speech is a tour de force, and I am most grateful for the detailed way in which she is responding. In fact, I thought I would give her a bit of a rest by making an intervention, because I think she probably needs a glass of water. The prevalence study has been a huge bone of contention. When my hon. Friend the Member for Tiverton and Honiton (Angela Browning) introduced her ten-minute Bill, the Government promised that there would be a prevalence study. The non-delivery of that has caused an awful lot of the problems. The Minister says once again that the prevalence study is coming. We know that Christmas is coming, too, but does she have a firm date as to when the prevalence study will take place?